US3552215A - Tester for timer controlled device - Google Patents
Tester for timer controlled device Download PDFInfo
- Publication number
- US3552215A US3552215A US788902A US3552215DA US3552215A US 3552215 A US3552215 A US 3552215A US 788902 A US788902 A US 788902A US 3552215D A US3552215D A US 3552215DA US 3552215 A US3552215 A US 3552215A
- Authority
- US
- United States
- Prior art keywords
- timer
- dishwasher
- transducer
- fill
- cycle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B23/00—Testing or monitoring of control systems or parts thereof
- G05B23/02—Electric testing or monitoring
- G05B23/0205—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults
- G05B23/0218—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults characterised by the fault detection method dealing with either existing or incipient faults
- G05B23/0224—Process history based detection method, e.g. whereby history implies the availability of large amounts of data
- G05B23/0227—Qualitative history assessment, whereby the type of data acted upon, e.g. waveforms, images or patterns, is not relevant, e.g. rule based assessment; if-then decisions
- G05B23/0235—Qualitative history assessment, whereby the type of data acted upon, e.g. waveforms, images or patterns, is not relevant, e.g. rule based assessment; if-then decisions based on a comparison with predetermined threshold or range, e.g. "classical methods", carried out during normal operation; threshold adaptation or choice; when or how to compare with the threshold
Definitions
- An apparatus for testing timer controlled devices such as dishwashers having a timer mechanism which controls electrically the components of the device in a programmed sequence, includes an auxiliary timer drive motor which is temporarily connected to the internal timer to move it rapidly through its operating cycle, transducers connected to various components within the device to sense their operating conditions, circuit means sensing if any component deviates from its prescribed limits and if it operates at the proper time during the programmed sequence, and indicator lamps for specifically identifying any component which fails to operate properly.
- Timer control devices such as dishwashers, washing machines, and the like, are often tested before they are packaged and shipped from the factory to insure that all of the components within the devices operate within prescribed limits and in accordance with a programmed sequence as determined by a timer motor.
- a timer motor places the machine through a complete cycle of operation in approximately sixty minutes. Therefore, it is obviously impractical to allow the timer to control the testing operation by itself since an inordinate amount of time would be consumed for each unit tested.
- timers Since most timers have a shaft on which is mounted a control knob and which is accessible from the outside of the dishwasher, it is possible to advance the timer manually and check whether the proper operations are being performed. However, this requires that an operator be present to move the timer through the program sequence. On those dishwashers which have timers located remotely, then manual operation of the timer becomes difficult, if not impossible.
- the shaft position of the timer cannot be used alone as a reference since manufacturing tolerances may cause one or more of the cams within the timer to be displaced from the shaft, and thus the cams may not actuate the proper switches exactly in accordance with the shaft position. Consequently, it is preferable to run the timer through its 1 complete cycle of operation in its actual operating environment while monitoring for proper operation of the devices which the timer controls.
- This invention relates to an automatic device for testing timer controlled devices, such as dishwashers, wherein transducers are installed to monitor the operation of certain components within the devices, and wherein the timer which controls the sequence of operation of these components is advanced rapidly through its cycle, usually under the control of an auxiliary motor which is temporarily attached to the drive shaft of the timer.
- the dishwashers are brought to a test stand and connected to fill and drain lines which are attached to transducers sensing the rate of flow of water through these lines.
- Power is connected to the dishwasher through a transducer which measures the amount of power consumed by the device and which therefore indicates whether the motors and heater circuits within the device are functioning properly.
- a transducer is connected to measure the speed of rotation of the wash arm to insure that it is within prescribed limits.
- Another transducer is connected to the blower to insure that a sufficient quantity of air is being passed through the dishwasher at the proper time, and a timer drive motor is temporarily connected to the shaft of the dishwasher timer to cause the timer to be advanced rapidly through its cycle of operation.
- sensors are attached to monitor the operation of the indicator lights in their proper sequence, and on certain models of dishwashers, solenoids are attached temporarily to actuate the dishwasher control push buttons at specified times during the test sequence.
- the test sequence is initiated and the speed of rotation of the wash arm is sensed by a transducer. If the wash arm speed does not fall within prescribed limits, the operator will momentarily discontinue the test, adjust the wash arm jets, and restart the test.
- the fill flow control washer within the dishwasher is then checked by monitoring the rate of flow of water in the fill line by a venturi, across which is connected at pressure transducer.
- a similar transducer is located in the drain line to insure that the drain pump develops proper flow.
- the power to this dishwasher is monitored to determine if it is consuming the correct amount of power thus indicating that the heating elements and pumps within the apparatus are functioning properly.
- FIG. 1 is a pictoral view showing a typical dishwasher with the cover lates removed thus exposing the various components which are to be tested, the auxiliary timer drive motor and the transducers which are attached to these components, and with a portion of the dishwasher housing broken away to show the wash arm assembly and the transducer attached to the assembly;
- FIG. 2 is a block diagram of the dishwasher tester circuit
- FIG. 3 is a timing chart showing the operations performed by each of the cams of the dishwasher timer motor
- FIG. 4A is a chart showing the power consumed by a properly operating dishwasher for each increment of rotation of the dishwasher timer motor and FIG. 4B shows the pilot lights illuminated during each increment;
- FIG. 5 shows the electrical symbols used in the detailed schematic diagram of the dishwasher tester
- FIG. 6 is an electrical schematic diagram of the circuit checking the wash arm rotational speed
- FIG. 7 is an electrical schematic of the circuit testing the proper operation of the rinse dispenser
- FIG. 8 is an electrical schematic diagram of the circuit used in sensing the power consumed by various components of the dishwasher.
- FIG. 9 is an electrical schematic diagram of the fill flow comparator and counter circuit
- FIG. 10 is an electrical schematic diagram of the drain flow comparator and counter circuit
- FIGS. 11A and 11B taken together, are electrical schematic diagrams showing the air flow comparator circuit and a portion of the tester control circuit
- FIGS. 12A and 1213 taken together, are electrical schematic diagrams showing the remainder of the tester control circuit, and the pilot light comparator circuit.
- FIG. 13 is the electrical schematic diagram of the circuit which indicates whether the dishwasher undergoing test should be accepted or rejected.
- FIG. I where a dishwasher 10 is shown which has a door 11 hinged at the front of the dishwasher which includes in the door a set of push buttons 12 for selecting one of the dishwashing cycles. and a set of indicator lights 13 which reveal the stage of progress of the dishwasher through the selected cycle.
- a soap dispenser 15 and a rinse dispenser 16 are also included in the door. The cover on the door has not yet been installed.
- a timer 17 is mounted underneath the dishwasher.
- This timer includes a drive motor 18 for moving the timer through the operating cycle, and a second motor 19 for advancing the timer rapidly through its cycle.
- the time is mounted on the door, and a shaft extends through the door cover. An external dial on the shaft shows the operating position of the timer and may be turned by the user to select a desired portion of the operating cycle.
- an air blower 20 which blows air through a heater, located generally at 21, and into the interior of the dishwasher 10 to assist in drying the contents.
- a wash arm assembly which includes a plurality of wash arms 26 each having openings 27 therein through which water is pumped to cause the wash arm to rotate and direct the water jets upwardly.
- a dishwasher When a dishwasher passes the test position, the operator moves it into place and connects the drain line 30 to a hose 31 in which is installed a drain fiow transducer 32.
- This trasducer includes a venturi 33 and a pressure transducer 34.
- the Water in the drain line 31 must be pumped by the dishwasher up a pipe 35 before being permitted to discharge from the line. This insures that the dishwasher pump is able to purge the water from the dishwasher at a specified rate while working against a head.
- the operator also connects the dishwasher to a fill line 26 in which is installed a flow transducer 37.
- the fill flow transducer 37 is similar in its construction to the drain fiow transducer 32.
- a wash arm rotation speed transducer 40 on the wash arm assemb y 25.
- This transducer includes a member 41 holding a magnet 42 which mounts on the wash arm to rotate therewith.
- a magnetic pickup 43 senses the passage of the magnet 42 and produces an electrical pulse for each revolution of the wash arm assembly 25.
- the transducer 43 is prevented from rotating by an arm 44 which extends to the side of the inner housing of the dishwasher.
- An auxiliary timer motor 45 is installed over a shaft 46 which extends from the timer 17 so that the timer motor can be advanced rapidly through is operating cycle.
- An indicator light detector assembly 48 which includes a plurality of photosensitive means, such as photodiodes, is installed over the dishwasher indicator lights 13.
- a push button actuator assembly 50 which includes a set of electrical solenoids, one for each push button switch on the door, is installed over the push button assembly 12 and therfore permits the automatic actuation of any one of the push buttons on the dishwasher. Of course, on those devices which do not use push buttons to control the operation thereof, this push button assembly is not needed.
- An electrical contact 55 is installed on one of the terminals of the solenoid which actuates the rinse dispenser 16 to indicate when the voltage is applied to that device.
- An air flow transducer 57 is installed to sense the flow of air into the blower 20.
- the air flow transducer in the preferred embodiment, includes a thermistor which is self-heating to about C. The cooling of this transducer from its normal operating temperature indicates the amount of air flow. In some cases, it may be necessary to provide thermal shielding means to prevent the heat from coils 21 from influencing the thermistor and giving an erroneous reading on the quantity of air flow.
- transducers are connected to the individual elements of the dishwasher, these elements including the wash arm, the air blower, the fill and drain lines, the rinse dispenser, and the pilot lights.
- the dishwasher is connected to a source of power through a watts transducer 60.
- the Model 1156 transducer (Scientific Columbus, Inc.) is used. This transducer supplies a DC output voltage which is proportional to the power consumed by the dishwasher.
- Each of the transducers, actuators and the auxiliary timer drive motor is electrically connected to the dishwasher test device, shown generally at 62, and any malfunctions within the dishwasher are displayed by lights on indicator panel 63.
- FIG. 2 is a block diagram showing generally the interconnection between the transducers, the control circuit, the auxiliary timer drive motor, the push button actuator, and the indicator panel. A more complete illustration of these circuits may be found in the electrical schematic diagrams of FIGS. 6 through 13. However, a detailed description of the circuits will not be undertaken since it will be immediately apparent to those skilled in the art how these circuits work once the function of each is explained.
- the tester apparatus of this invention will be described with reference to testing a Hobart Model KDS-16 dishwasher, which is described generally in Pat. Nos. 3,285,471 and 3,323,329.
- the timer of this type of dishwasher includes twelve cams, the function of each being shown in the timing chart of FIG. 3. Of course, only selected cams are used in any one of several programmed sequences available.
- FIG. 4A The power consumed by the Model KDS-l6 dishwasher for each interval of the timer motor is shown in FIG. 4A while the lights which are energized during a complete cycle of operation are illustrated in FIG. 4B.
- the operator depresses momentarily a test button 65 which initiates the operating cycle.
- the heavy soil cycle button is depressed by action of the push button actuator 50a (FIG. 12) which starts the dishwasher.
- the output from the wash arm transducer 40 is applied to a counter circuit 66 shown in FIG. 6 which determines whether the wash arm rotational speed is between specified limits. In the preferred embodiment, this is done by supplying a series of clock pulses from a source 67 to a counter 68, gating the counter into operation during the third revolution of the wash arm, then gating the counter off upon the occurrence of a fourth revolution, and determining the number within the counter.
- the RPMH lamp will be illuminated. and if the wash arm speed is too low, the RPML lamp will be illuminated. If either of these lamps remains on, the WARL lamp will light and the test discontinued until the operator adjusts the jets 27 on the wash arm 26 to provide the proper wash arm speed.
- wash arm rotational speed is within prescribed limits, a signal is applied on line A1 to the control circuit 70, shown in FIGS. 11 and 12, and the remainder of the test cycle in initiated.
- FIGS. 6 through 12 The interconnection among the electrical schematics of FIGS. 6 through 12 is as follows: Any line carrying a signal originating in FIG. 6 is prefixed with the letter A, and any lines carrying signals originating in FIGS. 8 through 12 are prefixed with the letters B through F, respectively.
- the output from FIG. 6 on line AI will be found as an input line A1 at the upper left in FIG. 11B, while an output E1 from the control circuit (upper right of FIG. 11B) is applied to the circuit shown in FIG. 9 (upper left).
- the full cycle button is actuated and the timer is advanced rapidly by its own rapid advance motor past the first and fill and drain periods. Therefore, these functions will have to be checked during the second cycle of the dishwasher timer.
- a total of seven fill and seven drain periods are required for a complete operational cycle of the dishwasher described herein.
- the dishwasher is tested for the proper flow rate.
- the output of the fill transducer 37 is applied to a comparator and counter circuit, shown in detail in FIG. 9, and the magnitude of the transducer signal is compared to reference voltages. If the fill flow rate is too high, the PH lamp will light, and if it is too low, the FL lamp will light. The fill fiow rate is therefore checked to insure that the fill flow control washer is functioning properly.
- the number of fill periods is also determined by a counter circuit, and if the number of periods is incorrect after the test is completed, the FN lamp will remain on.
- the fill fiow counter which includes three flip-flops shown gentrally at 73, also has outputs which are applied to the control circuit to cause other testing functions, such as the pilot light check, to occur at the proper time within the dishwasher cycle.
- the drain flow transducer 31 has its output connected to a comparator and counter circuit 75, shown in FIG. 10, and if the flow rate in the drain line is below a predetermined reference value, the DL lamp will light.
- the circuit 75 also includes a counter shown generally at 76, the output of which is applied to portions of the control circuit, and a drain number indicator lamp DN which will remain energized if an insufficient number of drain periods is performed by the dishwasher at the completion of the test.
- the output of the air flow transducer 57 is applied to the comparator circuit 80, shown in FIG. 11A, and if the air flow is too low, the AFL lamp will remain energized.
- the light sensors 48 which sense the operation of each of the pilot lamps 13, are connected to a comparator circuit 82, shown in FIG. 12B, and each light must be energized at the proper time during the cycle of operation. as represented by either the drain counter or the fill counter, and if these pilot lights fail to operate at the required time an error will be indicated by lighting an appropriate indicator lamp.
- the rinse dispenser probe senses when voltage is applied to the rinse dispenser solenoid, and if this occurs at the proper time, the RD lamp (FIG. 7) will be deenergized.
- the watts transducer has its output connected to a comparator circuit 78, shwon in FIG. 8, which determines whether the power consumed by the dishwasher at various times within the cycle falls within predetermined limits as provided by reference voltages to comparator circuits.
- the circuit 78 determines the power consumed by the pump, and if it is too high, the PH lamp will light, and if too low, the PL lamp will light.
- the circuit 78 also provides means to measure the power used by the water heater coils independently of the power consumed by the pump, and if the water heat power is too high, the WH lamp will light, and if too low, the WL lamp will light.
- FIG. 4A shows the power consumed for each timer interval during the dishwasher cycle.
- the dishwasher is tested for power consumption by supplying an enabling signal after the second complete fill cycle to the circuit at the upper right in FIG. 8. If the power consumed by the dishwasher, as indicated by the watts transducer 60 is within the limits established by the pump watts reference voltages, both lamps PH and PL will extinguish. Referring to FIG. 4, the power being measured at this time is that which is consumed by the dishwasher during interval 4 and represents the power consumed by both the pump motor and the fill valve.
- This power level is also applied to an operational amplifier network, shown at the lower right in FIG. 8.
- This circuit subtracts the power consumed by the pump and fill valve from the power consumed during the third fill cycle, interval 6, to give an indication of the power consumed by the water heater alone.
- the output of this network is supplied to indicator lamps WH and WL which indicate whether the power consumed was within the limits established by the water heat reference voltages.
- the output of the watts transducer is also applied on line B1 where it is compared to a reference voltage during the 27th interval to check the power consumed by the sanitizing heater coil, and if it is within predetermined limits, lamps SH and SL will extinguish. Also, the air heater coil is monitored by the watts transducer after the 36th interval, and if the power is within prescribed limits, both lamps AHH and AHL will extinguish.
- each of the indicator lamps described above is also connected to a plurality of circuits, and at the end of the test, if any one of these lamps remains energized, an output from these gate circuits will cause the reject lamp to light to alert the operator to the fact that a component has malfunctioned in the dishwasher. The nature of the malfunction may be determined by observing which lamp remains energized. If all the lamps at the end of the testing cycle are deenergized, the accept" lamp 86 will energize to ind cate that the dishwasher test has been satisfactorily performed.
- a dump valve 87 shown at the upper right in FIG. 13, is actuated at the conclusion of the testing sequence to drain the dishwasher rapidly.
- the dump valve permits the water within the dishwasher to exit directly to a drain rather than through the flow transducer and against the head provided by pipe 35.
- the air flow rate is observed for minimum flow. performed by a selected element within the device; (6) The operation of the rinse dispenser after the fifth and fill is observed.
- the rinse lamp must be on at the sixth fill. 4.
- the apparatus of claim 1 further including:
- Ti u rapid advance trolled device includes a plurality of switches for select- 11 11 Wi h heat Off in the lime alloweding one of a plurality of different programmed sequences the air heat must come back on or error is indiof ti cated.
- said tester apparatus includes switch actuators (0 Rinse hold Y P ulna inCTEmBmS so mounted on the device that they operate said after 131ate Warm Y Timer must rapid advance switches selectively in response to said control cirn own in t t m allowed 10 the end of the 'Y- cuit means to test the proper operation of the switches ing cycle, or otherwise an error will be indicated.
- switch actuators (0 Rinse hold Y P ulna inCTEmBmS so mounted on the device that they operate said after 131ate Warm Y Timer must rapid advance switches selectively in response to said control cirn own in t t m allowed 10 the end of the 'Y- cuit means to test the proper operation of the switches ing cycle, or otherwise an error will be indicated.
- timer within the device includes a rapid Whlle t preierred embodiment has been descnbed advancing motor capable of moving the timer rapidly for use with a dishwasher such as Hobart M d through a portion of its sequence until it reaches the 16, it Will become apparent to those skilled in the art 40 Sequence Selected by the actuated switch.
- transducer means connected to the individual elements of the device for providing an output signal indicative of the operation of that element; a plurality of comparator means receiving an input from said transducer means and for comparing each said input to a reference; 6 control circuit means including a plurality of gate means operable to sense the output of selected comparator means according to the progress of the device through its predetermined sequence; and indicator means responsive to said comparator means for indicating a failure of an individual element to produce a transducer output acceptable with respect to its reference. 2.
- said control circuit senses the operation of at least one of said individual 7.
- the apparatus of claim 1 further including transducer means for sensing the power consumed by said device;
- comparator circuit means responsive to said transducer and to the operation of said control circuit means for sensing whether the power consumed by the device at various times during the programmed sequence falls within predetermined limits
- indicator means responsive to said comparator means for indicating a failure of the device to consume power within said prescribed limits.
- Apparatus for testing machines such as dishwashers including automatically operable fill and drain controls, a motor operated pump means for circulating cleansing liquid, 9. control selector and a timer operable by said selector and operative to actuate said controls and pump means in apredetermined sequence, said apparatus comelements to operate said gate means in said predetermined pfisihgi sequence. drive means adapted for temporary connection to the 3.
- the apparatus of claim 1 further including: t mer to d ive the same rapidly through the operating counter means connected to the output of selected transcycle of the machine;
- ducer means to indicate the number of operations a plurality of transducers operative to sense at least fill
- control circuit including gating devices operative to control said drive means and to actuate said comparator circuits according to progress of the machine through its operating cycle;
- 1 lndlCatOIS responsive 1O 531d comparator ClI'CUltS arranged to indicate failure of the machine to produce transducer outputs acceptable with respect to the reference inputs.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Washing And Drying Of Tableware (AREA)
Abstract
OPERATING CONDITIONS, CIRCUIT MEANS SENSING IF ANY COMPONENT DEVIATES FROM ITS PRESCRIBED LIMITS AND IF IT OPERATES AT THE PROPER TIME DURING THE PROGRAMMED SEQUENCE AND INDICATOR LAMPS FOR SPECIFICALLY IDENTIFYING ANY COMPONENT WHICH FAILS TO OPERATE PROPERLY.
Description
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US78890269A | 1969-01-03 | 1969-01-03 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3552215A true US3552215A (en) | 1971-01-05 |
Family
ID=25145933
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US788902A Expired - Lifetime US3552215A (en) | 1969-01-03 | 1969-01-03 | Tester for timer controlled device |
Country Status (1)
Country | Link |
---|---|
US (1) | US3552215A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5770808A (en) * | 1996-03-29 | 1998-06-23 | Toshiba Kikai Kabushiki Kaisha | Product quality determining methods for die cast machines |
US20120194348A1 (en) * | 2009-10-12 | 2012-08-02 | Bsh Bosch Und Siemens Hausgerate Gmbh | Household appliance, in particular a household dishwashing machine |
-
1969
- 1969-01-03 US US788902A patent/US3552215A/en not_active Expired - Lifetime
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5770808A (en) * | 1996-03-29 | 1998-06-23 | Toshiba Kikai Kabushiki Kaisha | Product quality determining methods for die cast machines |
US20120194348A1 (en) * | 2009-10-12 | 2012-08-02 | Bsh Bosch Und Siemens Hausgerate Gmbh | Household appliance, in particular a household dishwashing machine |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US4245309A (en) | Microprocessor based control circuit for washing appliances with diagnostic system | |
JP3188450B2 (en) | Operation monitoring system for item washer | |
US4241400A (en) | Microprocessor based control circuit for washing appliances | |
US4245310A (en) | Microprocessor based control circuit for washing appliances with overfill protection | |
US4663538A (en) | Control for coin actuated appliances | |
US4418398A (en) | Manual reset control circuit for microprocessor controlled washing appliance | |
US10816439B2 (en) | Methods of testing washing machine appliances | |
GB2070648A (en) | Washing machine | |
JPS607510B2 (en) | Equipment programming device including safety circuits | |
JPH0159601B2 (en) | ||
EP0611159A1 (en) | Improvements in dosing systems | |
US4807661A (en) | Fluid control valve | |
US3552215A (en) | Tester for timer controlled device | |
KR20070093612A (en) | A dryer and control method of drying time for the same | |
NO811324L (en) | DIRECTORY FOR WASHING MACHINES OR LIKE. | |
KR20010036913A (en) | A method for detecting of error in washer | |
JPH06202296A (en) | Method and apparatus for diagnosis of processor | |
US3235794A (en) | Device for testing the accuracy of a time delay relay including means for measuring the elapsed times of the relay's closed and open cycles | |
GB2068589A (en) | Improvements In and Relating to Process Controllers and Programme-controlled Machines | |
KR100297051B1 (en) | Laundry Resetup method in washing machine | |
JP3336222B2 (en) | Combustion device and its failure diagnosis method | |
KR910008472B1 (en) | Cleansing devices for table ware | |
JP3246497B2 (en) | Operation panel in rice washing rice cooker | |
JP2602697B2 (en) | Screw start control method | |
JPH0556151B2 (en) |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: HOBART CORPORATION, WORLD HEADQUARTERS BUILDING, T Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:HOBART INTERNATIONAL INC., A CORP. OF OHIO;REEL/FRAME:004080/0758 Effective date: 19820528 |
|
AS | Assignment |
Owner name: KITCHENAID, INC., Free format text: CHANGE OF NAME;ASSIGNOR:HOBART CORPORATION;REEL/FRAME:004412/0911 Effective date: 19850513 |
|
AS | Assignment |
Owner name: TRABOH CORPORATION Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:KITCHENAID, INC.;REEL/FRAME:004683/0001 Effective date: 19850621 |
|
AS | Assignment |
Owner name: WHIRLPOOL CORPORATION Free format text: ASSIGNMENT OF ASSIGNORS INTEREST. EFFECTIVE SEPT 12, 1988;ASSIGNOR:EMERSON CONTRACT DIVISION, INC.;REEL/FRAME:004951/0285 Effective date: 19880912 Owner name: WHIRLPOOL CORPORATION,STATELESS Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:EMERSON CONTRACT DIVISION, INC.;REEL/FRAME:004951/0285 Effective date: 19880912 Owner name: EMERSON CONTRACT DIVISION, INC.,KENTUCKY Free format text: CHANGE OF NAME;ASSIGNOR:TRABOH CORPORATION;REEL/FRAME:004951/0280 Effective date: 19860228 Owner name: EMERSON CONTRACT DIVISION, INC. Free format text: CHANGE OF NAME;ASSIGNOR:TRABOH CORPORATION;REEL/FRAME:004951/0280 Effective date: 19860228 |